CN1252918C - Sonic surface wave device and wave separator - Google Patents
Sonic surface wave device and wave separator Download PDFInfo
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- CN1252918C CN1252918C CNB031009883A CN03100988A CN1252918C CN 1252918 C CN1252918 C CN 1252918C CN B031009883 A CNB031009883 A CN B031009883A CN 03100988 A CN03100988 A CN 03100988A CN 1252918 C CN1252918 C CN 1252918C
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- surface wave
- acoustic surface
- assembly
- wave device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H9/72—Networks using surface acoustic waves
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
- H03H9/0566—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers
- H03H9/0576—Constructional combinations of supports or holders with electromechanical or other electronic elements for duplexers including surface acoustic wave [SAW] devices
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/02—Details
- H03H9/05—Holders; Supports
- H03H9/10—Mounting in enclosures
- H03H9/1064—Mounting in enclosures for surface acoustic wave [SAW] devices
- H03H9/1071—Mounting in enclosures for surface acoustic wave [SAW] devices the enclosure being defined by a frame built on a substrate and a cap, the frame having no mechanical contact with the SAW device
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H9/72—Networks using surface acoustic waves
- H03H9/725—Duplexers
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- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
The invention provides a surface acoustic wave device and branching filter. A receiving side SAW device 22 having respective signal terminals 17a and 17b for input/output in respective corners on diagonals, respectively is provided. A transmitting side SAW device 23 having respective signal terminals 17h and 17i for input/output in respective terminals (corners) on one side, respectively is provided. On a circuit board 21, the respective SAW devices 22 and 23 are provided while being connected to an antenna side wiring pattern 21a in the state of making proximate the respective signal terminals 17a and 17i to each other. The surface acoustic wave (SAW) device which is to be used for a branching filter for transmission/reception and enlarges an attenuation quantity on the opposite side.
Description
Technical field
The present invention relates to as acoustic surface wave device that use, that channel-splitting filter is used such as the electronic component of mobile phone etc. and comprise its channel-splitting filter.
Background technology
In the past acoustic surface wave device (below, be called the SAW device) in, as shown in Figure 9, be provided with Surface Acoustic Wave Filter (below, be called the SAW filter) be contained on the inner surface, the assembly 27 of cube shaped roughly, each signal terminal 27a, 27b that the input and output of SAW filter are used is configured to make each signal terminal 27a, 27b and each earth terminal 27c to be positioned at the center of whole row's terminal group, promptly to be located on the central portion of each limit portion of outer surface of said modules 27.
In above-mentioned SAW filter, on piezoelectric substrate, each signal terminal used with input and output and earth terminal are connected comb type electrode part a plurality of, that can bring into play filter function (be also referred to as the Inter-Digital Transducer of curtain shape electrode, below, be called IDT) are set.Therefore in above-mentioned SAW filter, when inputing to electric signal (interchange) among the IDT, surface acoustic wave results from the piezoelectric substrate in this IDT, and on piezoelectric substrate, transmit, the surface acoustic wave that transmits is detected and be output by becoming electric signal on another IDT, just can bring into play the function of filter.
As such SAW device, as shown in figure 10, there is each signal electrode that on Japanese patent laid-open 7-264000 communique, discloses to utilize respectively with internal electrode 37a, 37b and respectively overlaps the SAW device that lead 30,31 is connected with each signal of assembly 27 with above-mentioned SAW filter 37.
In addition, open in the flat 6-97759 communique, as shown in figure 11, disclose the signal electrode have SAW filter 42 and utilize respectively with each electrode 47a, 47b of assembly 27 and respectively overlap piece (Japanese: the 48 SAW devices that are connected バ Application プ) the spy.
Known have 2 such SAW devices are loaded in the transmitter side of circuit substrate and the channel-splitting filter of receiver side respectively.(Japanese: Off イ リ Application グ) the SAW device of the channel-splitting filter of Chenging is being installed from the signal from antenna, by the different mutually transmitter side in frequency band territory, each SAW filter of receiver side, need make the attenuation of passing through in the frequency band territory of opposite side obtain bigger.
In the occasion that makes the channel-splitting filter miniaturization that has such SAW device respectively, open in the flat 9-181567 communique the spy, as Figure 12 and shown in Figure 13, each limit order of the assembly 27 of SAW device is spent each limit rotation 45 of circuit substrate 51, said modules 27 is loaded on the circuit substrate 51, utilizes the outside terminal of the wiring graph connecting circuit substrate 51 on the circuit substrate 51 and each terminal of SAW device.
In addition, open on the flat 11-17495 communique, use the assembly 27 of the SAW device of shape as shown in Figure 9, and as shown in figure 14, said modules 27 is loaded on the circuit substrate 61 the spy.
But in the channel-splitting filter of above-mentioned use SAW device in the past, the electrode that connects between the signal terminal is elongated, thus be created in opposite side pass through that attenuation can not obtain bigger problem in the frequency band territory.
On the other hand, make module on printed base plate or the ceramic substrate and turn in the electronic component of feature in that the SAW filter is installed in, owing to the tendency of compact in size enough contact areas can not be set, be created in the problem of passing through to obtain on the frequency band territory big attenuation of opposite side.
In addition, SAW device in the past since with other the assembly sharing of electronic component, simple in structure, and signal terminal is configured in the central authorities of the limit portion of assembly.But, when signal terminal is configured in central authorities, since earth terminal be configured on the both ends of above-mentioned limit portion, so (Japanese: ダ イ ア) contact-making surface is by disjunction for the rhombus that is connected with each earth terminal, its area stenosis, in addition, the dispersion owing to grounding electrode produces the problem that can not obtain abundant ground connection.In addition, because the signal terminal of assembly and close respectively each input and output terminal of the lead that is connected with IDT, so also produce the problem of characteristic degradation because of the phase mutual interference.
Summary of the invention
In order to address the above problem, SAW device of the present invention, difference signalization terminal at least 2 limit portions of the assembly that loads Surface Acoustic Wave Filter, the input that is used for Surface Acoustic Wave Filter with and each signal terminal of output usefulness, at least one side's signal terminal is configured on the end of 1 limit portion of assembly.
In order to address the above problem, another SAW device of the present invention, difference signalization terminal at least 2 limit portions of the assembly that loads Surface Acoustic Wave Filter, the input that is used for Surface Acoustic Wave Filter with and each signal terminal of output usefulness, at least one side's signal terminal is configured on the corner portion of assembly.
In order to address the above problem, other SAW device of the present invention, difference signalization terminal at least 2 limit portions of the assembly that loads Surface Acoustic Wave Filter, each signal terminal of usefulness is used and is exported in the input that will be used for Surface Acoustic Wave Filter, be configured on the diagonal of the mutual relative above-mentioned 2 limit portions on the said modules, and be configured on the end of above-mentioned 2 limit portions.
Adopt said structure, with in each signal terminal, at least one side's signal terminal, on the end of one side portion by being configured in assembly, or the corner portion of one side portion of assembly, or on the diagonal of the mutual relative above-mentioned 2 limit portions of said modules, and be configured in the end of above-mentioned 2 limit portions, so can shorten the wiring graph that is connected with signal terminal, and can be suppressed at by the overseas interference that causes of frequency band, can increase by the overseas attenuation of frequency band.
In addition, in said structure, because signal terminal is configured in end and corner portion, so earth terminal is concentrated, for example, when being loaded on the circuit substrate of PCB substrate etc., the ground connection of the rhombus contact-making surface of foregoing circuit substrate is strengthened, can improve the transmission characteristic of attenuation characteristic etc.
In addition, in said structure, because each signal terminal is configured in respectively on end or corner portion or the diagonal angle, so can be more in the past than the distance of guaranteeing between each signal terminal biglyyer, therefore, can increase the distance that is connected with each signal terminal, for example increase distance between the lead, just can improve transmission characteristic.
In addition, in said structure, owing to the distance that can guarantee between each signal terminal, so can obtain for example to prevent that the signal of receiver side is back to the effect of transmitter side, compared with the past be suppressed at respectively with lead that each signal terminal is connected between the direct wave that produces, can improve transmission characteristic.
In order to address the above problem, channel-splitting filter of the present invention,
Above-mentioned any SAW device is located on the circuit substrate.
Adopt said structure, because the SAW device of the application of the invention, can increase and pass through the overseas attenuation of frequency band, for example, the occasion that has 2 mutual different 2 SAW devices that pass through the frequency band territory in use, the attenuation in the frequency band territory passed through can be increased, transmission characteristic can be improved at opposite side.
In above-mentioned channel-splitting filter, preferably have send with and receive at least 2 SAW devices of usefulness, be adjacent to dispose respectively 2 SAW devices mutually at the signal terminal separately of the antenna side sharing of 2 SAW devices.
Adopt said structure, because each signal terminal at the antenna side sharing of 2 SAW devices is adjacent to dispose respectively 2 SAW devices mutually, so can shorten the wiring graph that is connected with signal terminal more reliably, the interference in the frequency band territory passed through of opposite side can be suppressed at, the attenuation in the frequency band territory passed through of opposite side can be increased.
In above-mentioned channel-splitting filter, also can have send with and receive at least 2 SAW devices of usefulness, and will receive in the SAW device of usefulness input with and each signal terminal of exporting usefulness be configured in respectively on the diagonal of assembly.
Adopt said structure, in the SAW device that receives usefulness, because each signal terminal is configured in respectively on the diagonal of assembly, so the comparable distance of guaranteeing between each signal terminal in the past biglyyer.Thus, can increase be connected with each signal terminal, for example increase interval between the lead, can suppress the coupling between each lead, what the SAW device of available reception usefulness increased transmitter side pass through to be with attenuation in the frequency of territory.
In addition, in said structure,, can strengthen ground connection owing to just can widely set like that the area of rhombus contact-making surface as described, thus can increase transmitter side with the SAW device of reception usefulness pass through to be with attenuation in the frequency of territory.
In above-mentioned channel-splitting filter, the input in sending the SAW device of usefulness with and each signal terminal of output usefulness be configured in respectively on the two ends of same edge portion of assembly.
Adopt said structure, use the occasion of the SAW filter of each signal terminal that output usefulness is arranged to compare, just can make distribution easily and shortening, can realize miniaturization with in the past central authorities on 2 limits of assembly.
In above-mentioned channel-splitting filter, preferably have send with and receive at least 2 SAW devices of usefulness, send the input side terminal of SAW device of usefulness and the outlet side terminal that receives the SAW device of usefulness and be configured in respectively in the limit portion different with mutual adjacent limit portion in each SAW device.
Adopt said structure,, can shorten the wiring graph that is connected with signal terminal more reliably, and can be suppressed at the interference in the frequency band territory passed through of opposite side, can increase the attenuation in the frequency band territory passed through of opposite side by above-mentioned configuration.
In above-mentioned channel-splitting filter, the outlet side terminal of the SAW device of the input side terminal of the SAW device of transmission usefulness and reception usefulness is configured in respectively mutually along on the diagonal of circuit substrate.
Adopt said structure,, can shorten the wiring graph that is connected with signal terminal more reliably, and can be suppressed at the interference in the frequency band territory passed through of opposite side, can increase the attenuation in the frequency band territory passed through at opposite side by above-mentioned configuration.
In addition, in said structure, by above-mentioned configuration, because the input side terminal of the SAW device that sends usefulness and the outlet side terminal of the SAW device that receives usefulness are further separated reliably, so can keep well from the insulation of the relative receiver side of transmitter side.
In addition, in said structure, the interval between comparable each signal terminal (ANT., Tx., Rx.) of in the past guaranteeing channel-splitting filter biglyyer, can suppress in the channel-splitting filter direct wave, suppress the direct wave on user's the circuit substrate.
In above-mentioned channel-splitting filter, preferably send the assembly of SAW device of usefulness and the assembly that receives the SAW device of usefulness and be installed on the circuit substrate with staggering mutually.
In above-mentioned channel-splitting filter, also can be arranged on and send coupling in each the SAW device that receives usefulness, that be connected with the coupling part of antenna side with electronic component and to cover above-mentioned coupling is mounted with conductivity with the state of electronic component and each SAW device cover member.
Description of drawings
Fig. 1 represents the major part planar portions of channel-splitting filter of the present invention.
Fig. 2 represents to be used for the major part plane graph of the SAW device of above-mentioned channel-splitting filter.
Fig. 3 represents the key diagram of the configuration of each signal terminal of assembly of above-mentioned SAW device and each earth terminal.
Fig. 4 represents the key diagram of a variation of above-mentioned configuration.
Fig. 5 represents the major part plane graph of comparison SAW device.
Fig. 6 represents SAW device of the present invention and compares the curve chart of each transmission characteristic of SAW device.
Fig. 7 represents the major part planar portions of a variation of above-mentioned channel-splitting filter.
Fig. 8 represents the key diagram of another variation of above-mentioned channel-splitting filter, (a) represents removal metal cap and the major part solid portion that each SAW device is staggered state mutually, (b) the major part solid portion of state behind the expression installation metal cap.
Fig. 9 represents the key diagram of the configuration of each signal terminal of assembly of SAW device in the past and each earth terminal.
Figure 10 represents the key diagram of an example of above-mentioned SAW device, (a) expression general view, (b) expression general profile chart.
Figure 11 represents another routine key diagram of above-mentioned SAW device, (a) expression exploded perspective view, (b) expression general profile chart.
Figure 12 represents the major part planar portions of channel-splitting filter one example in the past.
Figure 13 represents another routine major part planar portions of channel-splitting filter in the past.
Figure 14 represents the major part planar portions of the another example of channel-splitting filter in the past.
Embodiment
Example of the present invention is described as follows to Fig. 8 according to Fig. 1.
In SAW device of the present invention, as shown in Figure 2, for example transmitting by 40 ± 5 ° of YcutX on the piezoelectric substrate 1 that LiTa03 constitute, with for example horizontal coupling resonator type a plurality of, 5 IDT2～6 for example are set.
IDT2～6, have 2 electrode fingers, above-mentioned electrode finger has banded base end part (busbar) and the electrode of a plurality of band shapes that are parallel to each other of extending to the direction of quadrature from a side's of this base end part sidepiece refers to, be sidepiece that the electrode with above-mentioned each electrode finger refers to mutually in the face of have the member of above-mentioned each electrode finger under the state of the electrode of packing between referring to.
In such IDT2～6, to representing length that each electrode refers to and width, interval that each adjacent electrode refers to, the intersection width of opposite length of the state of packing between mutual electrode refers to, just can be by setting respectively to the signal transformation characteristic and by being with the territory set.
In addition, in above-mentioned SAW device, form and to have roughly that the assembly that the under casing shape is arranged 7 of cubical profile is configured to piezoelectric substrate 1 is contained on the central portion of inner surface 7g.In addition, on the periphery of on the assembly 7, different with the accommodated position of piezoelectric substrate 1, inner surface 7g, each signal that input and output are used is separately positioned on internal electrode 7a, 7b on each corner portion on the diagonal of roughly rectangular inner surface 7g.
In addition, on above-mentioned inner surface 7g, on other 2 each corner portion, each grounding inner electrode 7c, 7d are set; And between signal is with internal electrode 7a and grounding inner electrode 7d, grounding inner electrode 7e is set; Between signal is with internal electrode 7b and grounding inner electrode 7c, grounding inner electrode 7f is set.
Utilize lead 10 assembly 7 in to carry out lead overlap joint with signal with the signal electrode 8 of the common electrode of internal electrode 7a and IDT2 and IDT3 as a side input and output.The signal of using as the opposing party's input and output utilizes lead 11 to carry out the lead overlap joint in assembly 7 with the signal electrode 9 of internal electrode 7b and IDT5 and IDT6.In addition, the opposing party's of IDT2 busbar 2a utilizes grounding inner electrode 7c and lead 12 to carry out lead overlap joint and ground connection in assembly 7.The side's of IDT4 busbar 4a utilizes grounding inner electrode 7e and lead 13 to overlap lead and ground connection in assembly 7.The opposing party's of IDT6 busbar 6a utilizes grounding inner electrode 7d and lead 14 to carry out lead overlap joint and ground connection in assembly 7.
As shown in Figure 3, on outer surface (outer bottom) 17g on the assembly 7, as the opposing face of above-mentioned inner surface 7g, with each signal position with internal electrode 7a, 7b opposite face on, the signal terminal 17a, the 17b that are connected usefulness respectively with the outside are set, and with the position of each grounding inner electrode 7c～7f opposite face on, each earth terminal 17c is set respectively.Thus, signal terminal 17a, 17b just are set on each corner portion on the diagonal of roughly rectangular outer surface 17g.
In addition, exemplified as described above each signal terminal 17a, 17b have been located at example on the diagonal of outer surface 17g, on each corner portion, but also can as shown in Figure 4 signal terminal 17h, 17i be located on the both ends (corner portion) of one side portion of outer surface 17g.Signal terminal 17h, 17i, same in function aspects with signal terminal 17a, 17b.
On such SAW device, because in each signal terminal that input and output are used, owing to the signal terminal to major general one side is located on the end of one side portion, owing to can prevent from signal terminal is configured between each adjacent earth terminal 17c, so can make each earth terminal 17c be adjacent to mutually concentrate.Thus, can strengthen in assembly 7, as the ground connection of the rhombus contact-making surface of outer surface 17g, can improve transmission characteristic.
, in SAW device in the past, as shown in Figure 9, with the same assembly 27 of assembly 7 in, each signal terminal 27a, 27b are arranged on respectively on the central portion of each relative mutually limit portion.Therefore, in order to compare, as shown in Figure 5, use the lead 30 corresponding, the lead 31 corresponding, be made into signal that signal that input and output are used uses with internal electrode 37a and signal electrode 8 and the opposing party's input and output and in assembly 27, carry out comparison SAW device after lead overlaps with internal electrode 37b and signal electrode 9 with lead 11 with lead 10.
In such comparison SAW device, owing to lead 30 is connected with internal electrode 37a, 37b with each signal of central portion respectively with lead 31, so be overlapped to form approaching state mutually.
On the other hand, in the present invention, because each signal that is configured on each corner portion is connected with lead 10 and lead 11 respectively with internal electrode 7a, 7b, so each lead 10,11 distance was each other separated than in the past, simultaneously owing to the distance between each lead 10,11 can be arranged to be parallel to each other, so can obtain to prevent to make the signal of receiver side to be back to the effect of transmitter side.Thus, compare with comparing the SAW device, the present invention more can be suppressed at the direct wave that produces between each lead 10,11, so can improve transmission characteristic.
For the improvement of this transmission characteristic, investigated the transmission characteristic of Fig. 2 and SAW device of the present invention shown in Figure 3 and comparison SAW device shown in Figure 5 respectively.Its result's remittance is shown in Fig. 6 (to be represented the present invention with solid line, dots comparison SAW device.)
From this result as can be known, the present invention can strengthen ground connection owing to the contact area on the rhombus contact-making surface can be done greatly, so can increase by with overseas attenuation.Therefore, by SAW device of the present invention is used in the channel-splitting filter as described later, the attenuation of opposite side in channel-splitting filter is improved with increasing.
In addition, as shown in Figure 6, the present invention is in a ratio of bigger at the utmost point of decay with comparison SAW device as can be known.Like this, because the utmost point of decay is bigger, not only have SAW device of the present invention and channel-splitting filter described later (DPX) with it, and have the manufacturing tolerance of each signal of the present invention with the electronic component of the configuration of internal electrode (signal terminal) because of relaxing, so can improve the qualification rate of above-mentioned electronic component.
In channel-splitting filter of the present invention, as shown in Figure 1, sending 2 SAW devices 22,23 of receiving usefulness and as coupling each matching element 24,25,26 with connecting respectively on as the wiring graph 21a that is connected usefulness of antenna coupling part to be mounted with on the circuit substrate 21 with the LC element.
Above such 2 SAW devices 22,23 are arranged on the circuit substrate 21 of printed base plate mutually, make opposed facing each limit portion become parallel, and be roughly collinear occasion will being mounted to each limit portion of the limit portion adjacency of facing, each signal terminal 17a, 17i of antenna side in each SAW device 22,23 of receipts transmitter side is connected with wiring graph 21a by the overlap joint piece, and each SAW device 22,23 closely is mounted to adjacent state mutually on circuit substrate 21.
In addition, the opposing party's of SAW device 22 signal terminal 17b is connected with the wiring graph 21b of receiver side on the circuit substrate 21.The opposing party's of SAW device 23 signal terminal 17h is connected with the wiring graph 21c of transmitter side on the circuit substrate 21.
In addition, wiring graph 21a, the 1st through hole of the limit central authorities of portion of the ANT side by circuit substrate 21 and being connected with the ANT outside terminal (not shown) of the rear side (opposing face of the formation face of wiring graph) of circuit substrate 21.Wiring graph 21b is by with the 2nd through hole of the limit central authorities of portion of the limit portion adjacency of ANT side and be connected with the Rx outside terminal (not shown) of the rear side of circuit substrate 21.Wiring graph 21c, with the limit portion of ANT side in abutting connection with and by being connected with the Tx outside terminal (not shown) of the rear side of circuit substrate 21 with the 3rd through hole of the limit central authorities of portion of the limit portion relative position of the 2nd through hole.
; in order to make the channel-splitting filter miniaturization assembly rotation of SAW device was configured to 45 degree (with reference to Figure 12,13) in the past; it is complicated that the wiring graph of the connection usefulness of antenna coupling part becomes, and also must be used for from the transmitter side input terminal of assembly and the receiver side lead-out terminal band territory to the wiring graph especially of the distribution of the signal terminal of channel-splitting filter.
In contrast, compared with the past by at corner portion signalization terminal in the present invention, just can realize small-sized channel-splitting filter and compound electronic component.Beyond channel-splitting filter, even a plurality of SAW devices are being installed in the occasion that is electrically connected on the bigger circuit block, the distribution of its circuit block is become easily, can realize miniaturization.
In addition, in the present invention, on circuit substrate 21, be configured on the diagonal mutually, be configured on the position that separates most mutually, so can keep well from the insulation of the relative receiver side of transmitter side owing to will send input terminal and receive lead-out terminal.
In addition, as shown in Figure 7, with signal terminal 17a, 7b is configured in 2 limit portions of assembly 7, and be configured in the SAW device 22 on the diagonal, 22 ' closely (makes each SAW device 22, the roughly the same ground of the area of 22 ' the total loading space and the loading surface of circuit substrate 21) be loaded on the circuit substrate 21, and the occasion of seeking as far as possible miniaturization, the signal terminal 17a that receives usefulness owing to the transmission that makes the antenna terminal side is closely adjacent mutually, the signal terminal 17b that makes the opposing party mutually efficiently (the most dividually) be configured in each corner portion (corner portion 9) of channel-splitting filter, so can further keep well from the insulation of the relative receiver side of transmitter side.
In addition, in said structure, on the central portion of one side portion on the circuit substrate 21, wiring graph 21b, the wiring graph 21c of transmitter side of the receiver side on two corner portion of wiring graph 21a that antenna terminal uses, the another side portion relative with described one side portion can be set, therefore, the necessary in the past wiring graph to receiver side and transmitter side terminal surface can be removed from circuit substrate 21, can increase the area of earthy wiring graph 21d, and can further keep well from the insulation of the relative receiver side of transmitter side.
, for the characteristic of performance channel-splitting filter in certain area, the mounting arrangement of SAW device 22,23 and matching element 24,25,26 has big function influence to characteristic.For example, in known designs, use the more occasion of element, design again and consider to use miniaturization of components or removal with purpose for miniaturization, small-sized and adapt to anti-electric power and quite large-scale design alteration can be imagined in the impedance aspect from making the SAW device.
In addition,, shown in Fig. 8 (b), also metal cap must be installed, that is to say, consider the assembly 7 of SAW device from the problem aspect of the shielding of each wiring graph 21a, 21b, 21c and each matching element 24,25,26 of holding wire; Match circuit 24,25,26; The area of the welding surplus of metal cap 15 becomes product area.
Therefore, in the present invention, shown in Fig. 8 (a), the length direction of SAW device 22,23 edge opposite faces is separately installed mutually with staggering, matching element 24,25,26 is configured on the circuit substrate 21 between the limit portion of the SAW device 22 of reception (Rx) side and circuit substrate 21, metal cap surplus 21e is configured on the circuit substrate 21 between the limit portion of the SAW device 23 of transmission (Tx) side and circuit substrate 21.On such circuit substrate 21, shown in Fig. 8 (b), owing to utilize metal cap surplus 21e that metal cap 15 is mounted to the state that covers each SAW device 22,23 and each matching element 24,25,26, can load each matching element 24,25,26 and metal cap 15, and realize miniaturization.
SAW device of the present invention, as mentioned above, be in the assembly that loads the SAW filter, signalization terminal respectively in 2 limit portions at least, and the input that is used for the SAW filter with and at least one side's of each signal terminal of output usefulness signal terminal be configured in structure on the end of one side portion of assembly.
Therefore, in said structure, by the above-mentioned configuration of signal terminal, can shorten with signal terminal and be connected Wiring graph owing to can be suppressed at the interference on the frequency band territory passed through of phase offside, exist so can bring into play increase The effect of passing through the attenuation in the frequency band territory of phase offside.
Claims (12)
1. an acoustic surface wave device is characterized in that,
Difference signalization terminal at least 2 limit portions of the assembly that loads Surface Acoustic Wave Filter,
The input that is used for Surface Acoustic Wave Filter with and each signal terminal of output usefulness, at least one side's signal terminal is configured on the end of 1 limit portion of assembly.
2. an acoustic surface wave device is characterized in that,
Difference signalization terminal at least 2 limit portions of the assembly that loads Surface Acoustic Wave Filter,
The input that is used for Surface Acoustic Wave Filter with and each signal terminal of output usefulness, at least one side's signal terminal is configured on the corner portion of assembly.
3. an acoustic surface wave device is characterized in that,
Difference signalization terminal at least 2 limit portions of the assembly that loads Surface Acoustic Wave Filter,
Each signal terminal of usefulness is used and is exported in the input that will be used for Surface Acoustic Wave Filter, is configured on the diagonal of the mutual relative described 2 limit portions on the described assembly, and is configured on the end of described 2 limit portions.
4. a channel-splitting filter is characterized in that,
Acoustic surface wave device as claimed in claim 1 is arranged on the circuit substrate.
5. channel-splitting filter as claimed in claim 4 is characterized in that,
Have transmission and use and receive at least 2 acoustic surface wave devices of usefulness,
Dispose 2 acoustic surface wave devices respectively, make at the signal terminal separately of the antenna side sharing of 2 acoustic surface wave devices adjacent mutually.
6. channel-splitting filter as claimed in claim 4 is characterized in that,
Have transmission and use and receive at least 2 acoustic surface wave devices of usefulness,
Each signal terminal of input in the acoustic surface wave device of reception usefulness usefulness and output usefulness is configured in respectively on the diagonal of assembly.
7. channel-splitting filter as claimed in claim 6 is characterized in that,
With send in the acoustic surface wave device of usefulness input with and each signal terminal of output usefulness be configured in respectively on the two ends of same edge portion of assembly.
8. channel-splitting filter as claimed in claim 4 is characterized in that,
Have transmission and use and receive at least 2 acoustic surface wave devices of usefulness,
The outlet side terminal that sends the input side terminal in the acoustic surface wave device of usefulness and receive the acoustic surface wave device of usefulness is configured in respectively in the limit portion different with mutual adjacent limit portion in each acoustic surface wave device.
9. channel-splitting filter as claimed in claim 8 is characterized in that,
Be configured in respectively mutually along on the diagonal of circuit substrate sending the input side terminal of acoustic surface wave device of usefulness and the outlet side terminal that receives the acoustic surface wave device of usefulness.
10. channel-splitting filter as claimed in claim 5 is characterized in that,
With send usefulness acoustic surface wave device assembly and receive the assembly of the acoustic surface wave device of usefulness, be installed on the circuit substrate with staggering mutually.
11. channel-splitting filter as claimed in claim 5 is characterized in that,
Be arranged on the coupling electronic component that is connected with the coupling part of antenna side that sends in each acoustic surface wave device that receives usefulness, and the cover member of conductivity be installed so that cover described coupling electronic component and each acoustic surface wave device.
12. channel-splitting filter as claimed in claim 5 is characterized in that,
Have transmission and use and receive at least 2 acoustic surface wave devices of usefulness,
With send usefulness acoustic surface wave device the input side terminal and receive the outlet side terminal of the acoustic surface wave device of usefulness, be configured on the diagonal mutually and be configured on the position that separates most mutually.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002001635 | 2002-01-08 | ||
| JP2002001635A JP3747853B2 (en) | 2002-01-08 | 2002-01-08 | Wave splitter with surface acoustic wave device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1431773A CN1431773A (en) | 2003-07-23 |
| CN1252918C true CN1252918C (en) | 2006-04-19 |
Family
ID=19190638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031009883A Expired - Lifetime CN1252918C (en) | 2002-01-08 | 2003-01-08 | Sonic surface wave device and wave separator |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6906600B2 (en) |
| JP (1) | JP3747853B2 (en) |
| KR (1) | KR100477850B1 (en) |
| CN (1) | CN1252918C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004304622A (en) * | 2003-03-31 | 2004-10-28 | Fujitsu Media Device Kk | Surface acoustic wave device and its manufacturing method |
| JP2005124139A (en) * | 2003-09-25 | 2005-05-12 | Murata Mfg Co Ltd | Wave divider and communication device |
| JP4291164B2 (en) * | 2004-01-08 | 2009-07-08 | 富士通メディアデバイス株式会社 | Surface acoustic wave device |
| US7589451B2 (en) | 2004-04-01 | 2009-09-15 | Epson Toyocom Corporation | Surface acoustic wave device |
| JP3993579B2 (en) | 2004-04-28 | 2007-10-17 | 富士通メディアデバイス株式会社 | Balanced output type filter |
| JP3972928B2 (en) * | 2004-09-13 | 2007-09-05 | 松下電器産業株式会社 | Matching device, duplexer using the same, and portable receiver using the same |
| JP2006135447A (en) * | 2004-11-02 | 2006-05-25 | Fujitsu Media Device Kk | Branching filter |
| JP2007158039A (en) * | 2005-12-06 | 2007-06-21 | Epson Toyocom Corp | Electronic component |
| JP2007208516A (en) * | 2006-01-31 | 2007-08-16 | Epson Toyocom Corp | Method for manufacturing surface acoustic wave device, and surface acoustic wave device |
| WO2008105199A1 (en) * | 2007-02-28 | 2008-09-04 | Murata Manufacturing Co., Ltd. | Electromagnetic wave separator and its manufacturing method |
| WO2010032389A1 (en) | 2008-09-18 | 2010-03-25 | 株式会社 村田製作所 | Duplexer module |
| JP5740410B2 (en) | 2011-04-20 | 2015-06-24 | 太陽誘電株式会社 | Duplexer |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60185419A (en) * | 1984-03-05 | 1985-09-20 | Hitachi Ltd | Surface acoustic wave device |
| JPH0697759A (en) | 1992-09-16 | 1994-04-08 | Fujitsu Ltd | Surface acoustic wave device and its manufacture |
| JPH07226607A (en) * | 1994-02-10 | 1995-08-22 | Hitachi Ltd | Branching filter, branching filter module and radio communication equipment |
| JPH07264000A (en) | 1994-03-16 | 1995-10-13 | Fujitsu Ltd | Surface acoustic wave filter element and surface acoustic wave filter formed by packaging the same |
| JP3154640B2 (en) * | 1995-04-21 | 2001-04-09 | 三菱電機株式会社 | Surface acoustic wave device package |
| JPH09181567A (en) | 1995-12-22 | 1997-07-11 | Hitachi Media Electron:Kk | Surface acoustic wave branching filter |
| JP3735418B2 (en) * | 1996-08-28 | 2006-01-18 | 日本無線株式会社 | Surface acoustic wave device and communication apparatus using the same |
| TW404091B (en) * | 1997-05-16 | 2000-09-01 | Murata Manufacturing Co | Ladder filter having edge-reflection type resonators |
| JPH1117495A (en) | 1997-06-24 | 1999-01-22 | Oki Electric Ind Co Ltd | Branching filter |
| JP3487414B2 (en) * | 1998-05-29 | 2004-01-19 | 富士通株式会社 | Surface acoustic wave filter device |
| DE69938989D1 (en) * | 1998-05-29 | 2008-08-14 | Fujitsu Ltd | Acoustic surface acoustic wave filter with improved suppression outside of a passband |
| KR100277358B1 (en) | 1998-06-25 | 2001-01-15 | 윤종용 | Optical fiber base material manufacturing apparatus and method by chemical vapor deposition |
| KR100418550B1 (en) * | 1998-12-29 | 2004-02-11 | 가부시끼가이샤 도시바 | Surface acoustic wave device |
| US6720842B2 (en) * | 2000-02-14 | 2004-04-13 | Murata Manufacturing Co., Ltd. | Surface acoustic wave filter device having first through third surface acoustic wave filter elements |
| DE10013861A1 (en) * | 2000-03-21 | 2001-09-27 | Epcos Ag | Dual mode surface wave filter with improved symmetry and increased blocking damping e.g. for mobile telephones, has acoustic track on piezoelectric substrate with interdigital converters as signal input and output |
| JP2001339266A (en) | 2000-05-30 | 2001-12-07 | Tdk Corp | Laminated filter |
| JP2002217680A (en) * | 2001-01-22 | 2002-08-02 | Toyo Commun Equip Co Ltd | Ladder-type surface acoustic wave filter |
-
2002
- 2002-01-08 JP JP2002001635A patent/JP3747853B2/en not_active Expired - Lifetime
-
2003
- 2003-01-06 KR KR10-2003-0000537A patent/KR100477850B1/en active IP Right Grant
- 2003-01-08 CN CNB031009883A patent/CN1252918C/en not_active Expired - Lifetime
- 2003-01-08 US US10/337,990 patent/US6906600B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003204245A (en) | 2003-07-18 |
| US6906600B2 (en) | 2005-06-14 |
| KR20030060793A (en) | 2003-07-16 |
| US20030132817A1 (en) | 2003-07-17 |
| CN1431773A (en) | 2003-07-23 |
| KR100477850B1 (en) | 2005-03-22 |
| JP3747853B2 (en) | 2006-02-22 |
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Granted publication date: 20060419 |